I should have said that I meant all types of organisms can suffer from inbreeding,it is easy to think that more primitive ones are less afected by in breeding .that is not completely true. There are many examples where inbreeding has no obvious negative results. 'The only important thing is the genes. Inbreeding only gives a individuum a higher chance of having some defects in both copies of its genes. If one selects for these genes to be ok, when inbreeding you can even get a more healthy strain. Of course that is not an easy thing to do. But in general I would not say that inbreeding always has to have negative effects.
You can select for strong individuals even when inbreeding ,and it is always a question abot how much inbreeding you realy are doing ,hard to know with these types of animals as the don´t come with a pedigree and are usaly kept in groups.
The concept that you can inbreed untill you have removed all bad genes
is old and deply roted when it comes to pet breeding and have been shown
to have been wrong almost all the time.
Of course if no problems do apear, there is no need to worry.
I have got maybe six clutches in that tank with two orange males ,all whereI have never had any steril patzcuarensis. Maybe they were in form 2 when the females were ready or disturbed while mating etc.
infertile,I got one sucesfull clutch when a tiny chapalanus male manedged to clim over a tank divider witch to me would indicate that
thouse two orange males for some reason have not been fertile during this time,wich I guess also is a good illustration on what you wrote
about genetic purity in this group of species.I will not breed on from thouse
hybrides ,but it would be easy to breed them back to orange paztuarensis